Have a great fish, my Leporinus fasciatus, which is fun to watch and social in her own way. She is about 4.5" now. The LFS - usually solid advice - underestimated her full potential. She can get to be 12" which will not work in my 30 gal where she is. The 50 gal is the peaceful aquarium tank where MAYBE I could give her a try. I am sure many people run into this --- I always ask for the full size before buying a fish and usually confirm the info on the net before buying. Got suckered on this one. What else can I do besides moving her into the other tank which is all small and peaceful fish? Thanks for any advice.